4(х +2)=7(2х -1) -9(3х-4)+30
4х + 8 = 14х - 7 - 27х + 36 + 30
4х + 8 = 59 - 13х
17х = 51
х = 51 : 17
х = 3
Ответ. х=3.
4(х+2)=7(2х-1)-9(3х-4)+30
4х+8=14х-7-27х+36+30
4х+27х-14х=36+30-7-8
17х=51
х=51:17
х=3